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Dynamic Behavior of Galloping Micro Energy Harvester with the Elliptical Bluff Body Using CFD Simulation

Author

Listed:
  • Ali Karimzadeh

    (Department of Mechanical Engineering, College of Engineering, Fasa University, Fasa 74616-86131, Iran)

  • Masoud Akbari

    (Department of Mechanical Engineering, College of Engineering, Fasa University, Fasa 74616-86131, Iran)

  • Reza Roohi

    (Department of Mechanical Engineering, College of Engineering, Fasa University, Fasa 74616-86131, Iran)

  • Mohammad Javad Amiri

    (Department of Water Engineering, Faculty of Agriculture, Fasa University, Fasa 74616-86131, Iran)

Abstract

Energy extraction from flow-induced oscillations based on piezoelectric structures has recently been tackled by several researchers. This paper presents a study of the dynamic behavior analysis and parametric characteristics of a galloping piezoelectric micro energy harvester (GPEH) applied to self-powered micro-electro-mechanical systems (MEMS). The mechanical performance of a piezoelectric micro energy harvester cantilever beam with two layers of elastic silicon and piezoelectric (PZT-5A) attached to a tip elliptical cylinder is numerically simulated. Using size-dependent beam formulation on the basis of the modified couple stress theory and Gauss’ law, the coupled electro-mechanical non-linear governing equations of the energy harvester are obtained. The mode summation and Galerkin methods are used to derive the extracted power from the system. The study also models the flow field effect on the beam oscillations via CFD simulation. The effect of elliptical cylinder mass, damping ratio, beam thickness, and load resistance on the dynamic behavior and harvested power of the system is studied. Findings reveal that increasing the normalized tip mass from 0 to 0.5 and 1 increases the output power density from 0.12 to 0.2 and 0.22, respectively, and the corresponding electrical load resistance of maximum power increases from 175 to 280 kΩ and 375 kΩ, respectively. An approximately linear relation between the elliptical cylinder mass and the load resistance is observed. By increasing/decreasing the cylinder mass, the required electrical load resistance for maximum output power proportionally changes. The damping analysis shows that a higher damping ratio increases the onset velocity of galloping and decreases the extracted power.

Suggested Citation

  • Ali Karimzadeh & Masoud Akbari & Reza Roohi & Mohammad Javad Amiri, 2023. "Dynamic Behavior of Galloping Micro Energy Harvester with the Elliptical Bluff Body Using CFD Simulation," Sustainability, MDPI, vol. 15(16), pages 1-19, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:16:p:12187-:d:1213734
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    References listed on IDEAS

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    1. Wang, Junlei & Zhang, Chengyun & Hu, Guobiao & Liu, Xiaowei & Liu, Huadong & Zhang, Zhien & Das, Raj, 2022. "Wake galloping energy harvesting in heat exchange systems under the influence of ash deposition," Energy, Elsevier, vol. 253(C).
    2. Javed, U. & Abdelkefi, A., 2018. "Role of the galloping force and moment of inertia of inclined square cylinders on the performance of hybrid galloping energy harvesters," Applied Energy, Elsevier, vol. 231(C), pages 259-276.
    3. Chen, Shun & Zhao, Liya, 2023. "A quasi-zero stiffness two degree-of-freedom nonlinear galloping oscillator for ultra-low wind speed aeroelastic energy harvesting," Applied Energy, Elsevier, vol. 331(C).
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    1. Reza Roohi & Masoud Akbari & Ali Karimzadeh & Mohammad Javad Amiri, 2023. "Investigating the Effect of an Elliptical Bluff Body on the Behavior of a Galloping Piezoelectric Energy Harvester," Sustainability, MDPI, vol. 15(22), pages 1-18, November.

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